Almost everything new in JavaScript is built on Promises and async functions, and even the existing features of the language are starting to migrate to the new structure.
But they are not just keywords that magically make something async work with the rest of the program. Async changes how the function work and that can lead to errors without proper understanding.
From this book, you'll build an understanding on how Promises and async/await work and you'll be familiar with the common problems and their solutions.
Book + video course
Video course
| Introduction | |
| What you'll learn | 04:30 |
| Asynchronous programming in JavaScript | 07:55 |
| Async/await basics | |
| Async functions | 05:11 |
| Await | 08:09 |
| Special case: returning Promises | 04:47 |
| Promises | |
| The Promise constructor | 07:35 |
| Promises states | 05:50 |
| Error handling | |
| Error handling in async functions | 03:45 |
| Error handling in the Promise constructor | 04:37 |
| Async performance | |
| Parallel processing | 07:18 |
| Promisification | |
| Callback styles | 05:48 |
| Promisification | 07:19 |
| Miscellaneous | |
| Useful functions | 06:57 |
| Common errors | 13:25 |
| Example codes | 10:04 |
| Outro | |
| Congratulations | 00:42 |
About the author
Hey, I'm Tamás! I co-author the advancedweb.hu blog where I've published more than 300 articles to date on various technology topics.
I'm a software developer focusing mostly on cloud computing and web technologies. I'm especially interested in how to handle edge cases to end up with dependable software.
I find asynchronous programming fascinating as when everything works perfectly it feels like magic as various parts of a program are doing their things without interfering with each other. On the other hand, concurrency brings a lot of edge cases that can lead to bugs that are very hard to debug and fix. I enjoy thinking about these "what can go wrong" scenarios and observe a program that works well in many different conditions.
My books and courses:
Table of contents
- Introduction Preview
- Getting started with async/await Preview
- Async functions Preview
- Promises
- Error handling
- Parallel and sequential processing
- Returning multiple values Preview
- Convert between Promises and callbacks
- Promise timeouts
- The async serializer pattern
- The async disposer pattern
- Retrying async operations
- Paginating with async generators
- Using async functions with postMessage
- Collection processing with async functions
- Async for iteration
- Async functions with reduce
- Async functions with map
- Async functions with forEach
- Async functions with filter
- Async functions with some/every
- Common errors
- Glossary
- About the author
- Changelog
- Copyright
Buying options
Promises and Async/Await in JavaScript & Async/await in JavaScript
- Lifetime access to the book and the course
- All future updates
- Web, PDF, and Epub versions
Books & Courses package
